A two-stage process is used to separate impurities A and B from the useful compound C. The feed to the first stage (F1) contains 50% C, 25% A and 25% B (by mass). The final product stream (P) leaving the second stage must have a flow of 1000 lbm/day and contains 95% C. In the first stage, 90% of impurity A that comes in from the feed stream is removed. Assume no impurity B is removed in Stage 1 and no impurity A is removed in Stage 2 and all the compound C coming in with F1 is recovered in the product (P) stream. F1 F2 P Stage 1 Stage 2 Wi W2 a) Label all streams and compositions on the diagram using correct nomenclature. b) Choose a basis for your analysis. c) Perform a degree of freedom (DOF) analysis on each stage and on the overall process. a. Clearly write down all material balance equations, implicit and explicit equations you have been given to solve the problem. b. Calculate DOF based on number of unknown variables and number of equations. Can you solve the problem? d) What is the flowrate (F1) for P = 1000 lbm/day? e) What is the flow rate (F2) and percent composition of the stream entering stage 2? f) What is % A and % B in the product stream (P)?
A two-stage process is used to separate impurities A and B from the useful compound C. The feed to the first stage (F1) contains 50% C, 25% A and 25% B (by mass). The final product stream (P) leaving the second stage must have a flow of 1000 lbm/day and contains 95% C. In the first stage, 90% of impurity A that comes in from the feed stream is removed. Assume no impurity B is removed in Stage 1 and no impurity A is removed in Stage 2 and all the compound C coming in with F1 is recovered in the product (P) stream. F1 F2 P Stage 1 Stage 2 Wi W2 a) Label all streams and compositions on the diagram using correct nomenclature. b) Choose a basis for your analysis. c) Perform a degree of freedom (DOF) analysis on each stage and on the overall process. a. Clearly write down all material balance equations, implicit and explicit equations you have been given to solve the problem. b. Calculate DOF based on number of unknown variables and number of equations. Can you solve the problem? d) What is the flowrate (F1) for P = 1000 lbm/day? e) What is the flow rate (F2) and percent composition of the stream entering stage 2? f) What is % A and % B in the product stream (P)?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:A two-stage process is used to separate impurities A and B from the useful compound C. The
feed to the first stage (F1) contains 50% C, 25% A and 25% B (by mass). The final product stream (P)
leaving the second stage must have a flow of 1000 lbm/day and contains 95% C. In the first
stage, 90% of impurity A that comes in from the feed stream is removed. Assume no impurity B
is removed in Stage 1 and no impurity A is removed in Stage 2 and all the compound C coming
in with F1 is recovered in the product (P) stream.
F1
F2
P
Stage 1
Stage 2
Wi
W2
a) Label all streams and compositions on the diagram using correct nomenclature.
b) Choose a basis for your analysis.
c) Perform a degree of freedom (DOF) analysis on each stage and on the overall process.
a. Clearly write down all material balance equations, implicit and explicit equations you have
been given to solve the problem.
b. Calculate DOF based on number of unknown variables and number of equations. Can you
solve the problem?
d) What is the flowrate (F1) for P = 1000 lbm/day?
e) What is the flow rate (F2) and percent composition of the stream entering stage 2?
f) What is % A and % B in the product stream (P)?
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